President Trump’s interest in cutting funding for an anti-drug abuse office is drawing bipartisan pushback on Capitol Hill, where lawmakers say it’s necessary to fight an ongoing heroin epidemic.

“We know that [drug-free communities] coalitions work effectively to reduce substance abuse in youths in over 600 communities across the nation, and has provided support to 4.4 million middle school and 6.3 million high school students since inception,” Sen. Rob Portman, R-Ohio, and Rep. Sander Levin, D-Mich., wrote in a Wednesday letter to the White House.